When aimed, it breathes a cone of acid with width 20 degrees, dealing 120
damage at the source, which your device skill increases by 19 per cent.
Takes 50 turns to recharge.
Your chance of success is 88.9%

When aimed, it breathes a cone of fire with width 20 degrees, dealing 200
damage at the source, which your device skill increases by 27 per cent.
Takes 50 turns to recharge.
Your chance of success is 90.4%

It's funny because that's a pretty awful shooter otherwise, unless you really need CON. Only an x2 multiplier and poor to-dam means you'll be churning through a hell of a lot of ammo to take advantage of those 4 shots/round. Or 6 shots/round if you're a ranger!

When aimed, it breathes a cone of acid with width 20 degrees, dealing 120
damage at the source, which your device skill increases by 19 per cent.
Takes 50 turns to recharge.
Your chance of success is 88.9%